This is a note to let you know that I've just added the patch titled
IB/mlx5: Fix RC transport send queue overhead computation
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-mlx5-fix-rc-transport-send-queue-overhead-computation.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 75c1657e1d50730dc0130a67977f7831a4e241f4 Mon Sep 17 00:00:00 2001
From: Leon Romanovsky <leon@xxxxxxxxxx>
Date: Thu, 11 Feb 2016 21:09:57 +0200
Subject: IB/mlx5: Fix RC transport send queue overhead computation
From: Leon Romanovsky <leon@xxxxxxx>
commit 75c1657e1d50730dc0130a67977f7831a4e241f4 upstream.
Fix the RC QPs send queue overhead computation to take into account
two additional segments in the WQE which are needed for registration
operations.
The ATOMIC and UMR segments can't coexist together, so chose maximum out
of them.
The commit 9e65dc371b5c ("IB/mlx5: Fix RC transport send queue overhead
computation") was intended to update RC transport as commit messages
states, but added the code to UC transport.
Fixes: 9e65dc371b5c ("IB/mlx5: Fix RC transport send queue overhead computation")
Signed-off-by: Kamal Heib <kamalh@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Reviewed-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/qp.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -271,8 +271,10 @@ static int sq_overhead(enum ib_qp_type q
/* fall through */
case IB_QPT_RC:
size += sizeof(struct mlx5_wqe_ctrl_seg) +
- sizeof(struct mlx5_wqe_atomic_seg) +
- sizeof(struct mlx5_wqe_raddr_seg);
+ max(sizeof(struct mlx5_wqe_atomic_seg) +
+ sizeof(struct mlx5_wqe_raddr_seg),
+ sizeof(struct mlx5_wqe_umr_ctrl_seg) +
+ sizeof(struct mlx5_mkey_seg));
break;
case IB_QPT_XRC_TGT:
@@ -280,9 +282,9 @@ static int sq_overhead(enum ib_qp_type q
case IB_QPT_UC:
size += sizeof(struct mlx5_wqe_ctrl_seg) +
- sizeof(struct mlx5_wqe_raddr_seg) +
- sizeof(struct mlx5_wqe_umr_ctrl_seg) +
- sizeof(struct mlx5_mkey_seg);
+ max(sizeof(struct mlx5_wqe_raddr_seg),
+ sizeof(struct mlx5_wqe_umr_ctrl_seg) +
+ sizeof(struct mlx5_mkey_seg));
break;
case IB_QPT_UD:
Patches currently in stable-queue which might be from leon@xxxxxxxxxx are
queue-4.4/ib-mlx5-fix-rc-transport-send-queue-overhead-computation.patch
queue-4.4/ib-mlx5-fix-fw-version-diaplay-in-sysfs.patch
